70643625 has 64 divisors (see below), whose sum is σ = 129921792. Its totient is φ = 33868800.

The previous prime is 70643611. The next prime is 70643659. The reversal of 70643625 is 52634607.

It is not a de Polignac number, because 70643625 - 2⁵ = 70643593 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 209457 + ... + 209793.

It is an arithmetic number, because the mean of its divisors is an integer number (2030028).

Almost surely, 2^70643625 is an apocalyptic number.

70643625 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

70643625 is a deficient number, since it is larger than the sum of its proper divisors (59278167).

70643625 is a wasteful number, since it uses less digits than its factorization.

70643625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411 (or 401 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 33.

The square root of 70643625 is about 8404.9762046064. The cubic root of 70643625 is about 413.3878031898.

The spelling of 70643625 in words is "seventy million, six hundred forty-three thousand, six hundred twenty-five".